<!DOCTYPE html><html lang="zh-Hans"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"><meta name="description" content="iOS 自定义NSLog"><meta name="keywords" content="iOS"><meta name="author" content="kyren"><meta name="copyright" content="kyren"><title>iOS 自定义NSLog | Kyren's Blog</title><link rel="shortcut icon" href="/melody-favicon.ico"><link rel="stylesheet" href="/css/index.css?version=1.9.0"><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/font-awesome@latest/css/font-awesome.min.css?version=1.9.0"><meta name="format-detection" content="telephone=no"><meta http-equiv="x-dns-prefetch-control" content="on"><link rel="dns-prefetch" href="https://cdn.jsdelivr.net"><link rel="dns-prefetch" href="https://hm.baidu.com"><script>var _hmt = _hmt || [];
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<h4 id="1、自定义NSLog代码示例"><a href="#1、自定义NSLog代码示例" class="headerlink" title="1、自定义NSLog代码示例"></a>1、自定义NSLog代码示例</h4><figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">#ifdef DEBUG</span><br><span class="line">#define NSLog(fmt, ...) NSLog((@&quot;%s [Line %d] &quot; fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__)</span><br><span class="line">#else</span><br><span class="line">#define NSLog(...)</span><br><span class="line">#endif</span><br></pre></td></tr></table></figure>



<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line">#define NSLog(format, ...) \</span><br><span class="line">    do &#123; \</span><br><span class="line">        NSLog(@&quot;&lt;%@ : %d : %s&gt;-: %@&quot;, \</span><br><span class="line">        [[NSString stringWithUTF8String:__FILE__] lastPathComponent], \</span><br><span class="line">        __LINE__, \</span><br><span class="line">        __FUNCTION__, \</span><br><span class="line">        [NSString stringWithFormat:format, ##__VA_ARGS__]); \</span><br><span class="line">    &#125; while(0)</span><br><span class="line">    </span><br><span class="line">    </span><br><span class="line">#ifdef DEBUG</span><br><span class="line">#define NSLog(format, ...) \</span><br><span class="line">    //Log定义...</span><br><span class="line">#else</span><br><span class="line">    #define NSLog(format, ...) do&#123; &#125; while(0)</span><br><span class="line">#endif</span><br></pre></td></tr></table></figure>



<h4 id="2、如何控制调试-x2F-发布模式开关"><a href="#2、如何控制调试-x2F-发布模式开关" class="headerlink" title="2、如何控制调试&#x2F;发布模式开关"></a>2、如何控制调试&#x2F;发布模式开关</h4><figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">#ifdef DEBUG</span><br><span class="line">#   define NSLog(...) NSLog(__VA_ARGS__)</span><br><span class="line">#else </span><br><span class="line">#   define NSLog(...)</span><br><span class="line">#endif</span><br></pre></td></tr></table></figure>



<p>建议使用自定义Release&#x2F;DEBUG 模式开关，如下：</p>
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line">#warning 发布时，将APP_CUSTOM_DEBUG设置为0！!(0-发布  1-生产)</span><br><span class="line"></span><br><span class="line">#define APP_CUSTOM_DEBUG 0</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">#if APP_CUSTOM_DEBUG</span><br><span class="line">#define NEWS_NOTIFY_URL   @&quot;http://192.168.240.113.xxx&quot;//测试环境URL</span><br><span class="line">#else</span><br><span class="line">#define NEWS_NOTIFY_URL   @&quot;http://xxxxbbbb.com.cn/xxx&quot;//正式环境URL 线上地址</span><br><span class="line">#endif</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">#if APP_CUSTOM_DEBUG</span><br><span class="line">#   define NSLog(...) NSLog(__VA_ARGS__)</span><br><span class="line">#else</span><br><span class="line">#   define NSLog(...)</span><br><span class="line">#endif</span><br></pre></td></tr></table></figure>



<h4 id="3-相关参数释义"><a href="#3-相关参数释义" class="headerlink" title="3.相关参数释义"></a>3.相关参数释义</h4><p><strong>1）ifdef #ifndef #if…含义</strong></p>
<ul>
<li><code>#ifdef</code> - If this macro is defined（该宏已定义）</li>
<li><code>#ifndef</code> - If this macro is not defined（该宏未定义）</li>
<li><code>#if</code> - Test if a compile time condition is true（如果一个编译时条件是真的）</li>
<li><code>#else</code> - The alternative for #if （选择-如果）</li>
<li><code>#elif</code> - #else an #if in one statement（#其他#如果一个语句）</li>
<li><code>#endif</code> - End preprocessor conditional（结束预处理条件）</li>
</ul>
<p><strong>2）宏定义参数释义</strong></p>
<p>1、<code>__FILE__</code>   		宏在预编译时会替换成当前的<code>源文件名</code></p>
<p>2、<code>__LINE__</code>		宏在预编译时会替换成当前的<code>行号</code><br>3、<code>__FUNCTION__</code>	宏在预编译时会替换成当前的<code>函数名称</code></p>
<p>4、<code>__VA_ARGS__</code>		是一个<code>可变参数</code>的宏，这个可变参数的宏是新的C99规范中新增的，目前似乎只有gcc支（VC6.0的编译器不支持）。宏前面加上<code>##</code>的作用在于，当可变参数的个数为0时，这里的<code>##</code>起到把前面多余的”<code>,</code>“去掉的作用,否则会编译出错。</p>
<p><code>相关扩展阅读</code>：</p>
<p>Swift Log <a target="_blank" rel="noopener" href="https://gist.github.com/xmzio/fccd29fc945de7924b71">https://gist.github.com/xmzio/fccd29fc945de7924b71</a></p>
<p><a target="_blank" rel="noopener" href="http://www.knowstack.com/swift-print-println-nslog/">Swift print, println, NSLog</a></p>
<p><a target="_blank" rel="noopener" href="http://stackoverflow.com/questions/6552197/enable-and-disable-nslog-in-debug-mode">Enable and Disable NSLog in DEBUG mode</a></p>
</div></article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta">文章作者: </span><span class="post-copyright-info"><a href="mailto:undefined">kyren</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta">文章链接: </span><span class="post-copyright-info"><a href="http://huluo666.gitee.io/2016/08/10/iOS 自定义NSLog/">http://huluo666.gitee.io/2016/08/10/iOS 自定义NSLog/</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta">版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外，均采用 <a target="_blank" rel="noopener" href="https://creativecommons.org/licenses/by-nc-sa/4.0/">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="http://huluo666.gitee.io">Kyren's Blog</a>！</span></div></div><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/iOS/">iOS</a></div><nav id="pagination"><div class="prev-post pull-left"><a href="/2016/08/15/iOS%E5%AE%9E%E7%8E%B0%E6%A8%A1%E7%B3%8A%E6%95%88%E6%9E%9C/"><i class="fa fa-chevron-left">  </i><span>iOS  模糊效果实现方式</span></a></div><div class="next-post pull-right"><a href="/2016/06/14/iOS%E5%BC%80%E5%8F%91%20Xcode%E9%AB%98%E7%BA%A7%E8%B0%83%E8%AF%95/"><span>iOS开发 Xcode高级调试</span><i class="fa fa-chevron-right"></i></a></div></nav></div></div><footer><div class="layout" id="footer"><div class="copyright">&copy;2022 By kyren</div><div class="framework-info"><span>驱动 - </span><a target="_blank" rel="noopener" href="http://hexo.io"><span>Hexo</span></a><span class="footer-separator">|</span><span>主题 - </span><a target="_blank" rel="noopener" href="https://github.com/Molunerfinn/hexo-theme-melody"><span>Melody</span></a></div><div class="footer_custom_text">hitokoto</div><div class="busuanzi"><script async src="//busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js"></script><span id="busuanzi_container_page_pv"><i class="fa fa-file"></i><span id="busuanzi_value_page_pv"></span><span></span></span></div></div></footer><i class="fa fa-arrow-up" id="go-up" aria-hidden="true"></i><script src="https://cdn.jsdelivr.net/npm/animejs@latest/lib/anime.min.js"></script><script src="https://cdn.jsdelivr.net/npm/jquery@latest/dist/jquery.min.js"></script><script src="https://cdn.jsdelivr.net/npm/@fancyapps/fancybox@latest/dist/jquery.fancybox.min.js"></script><script src="https://cdn.jsdelivr.net/npm/velocity-animate@latest/velocity.min.js"></script><script src="https://cdn.jsdelivr.net/npm/velocity-ui-pack@latest/velocity.ui.min.js"></script><script src="/js/utils.js?version=1.9.0"></script><script src="/js/fancybox.js?version=1.9.0"></script><script src="/js/sidebar.js?version=1.9.0"></script><script src="/js/copy.js?version=1.9.0"></script><script src="/js/fireworks.js?version=1.9.0"></script><script src="/js/transition.js?version=1.9.0"></script><script src="/js/scroll.js?version=1.9.0"></script><script src="/js/head.js?version=1.9.0"></script><script src="/js/search/local-search.js"></script><script>if(/Android|webOS|iPhone|iPod|iPad|BlackBerry/i.test(navigator.userAgent)) {
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